TY  - GEN
AU  - William  F. Gay
AU  - 
ED  - United States.
TI  - Summary of national transportation statistics
U1  - US 380.50973 W 66 23rd ed.
PY  - 1975///
CY  - Washington DC
PB  - Dept. of transportation
KW  - Transportation
KW  - Statistics.
KW  - United States
N1  - Performing organization report no. DOT-TSC-OST-75-18; Final report : Jan. 1963-dec. 1973
ER  -